OctoPi: the Raspberry Pi image that turns a Pi into a 3D printer host

What OctoPi actually is, and the printer owner it is built for

The name is the first obstacle. This project has nothing to do with octopuses, and the related search data shows how often that confusion happens. OctoPi is a distribution image: Raspberry Pi OS with the OctoPrint host software for 3D printers installed out of the box, plus mjpg-streamer with RaspiCam support for live viewing of prints and timelapse video creation. The repository at guysoft/OctoPi holds the scripts that generate that image out of an existing Raspberry Pi OS image, or out of a Le Potato AML-S905X-CC image, which the README marks as currently in beta.

The person this is for is specific. You have a 3D printer, you have a Raspberry Pi, and you want the printer on the network so you can start a job, watch it, and stop it without a laptop tethered by USB. You do not want to install OctoPrint, configure a camera stream, and tune a minimal OS yourself. OctoPi answers that by handing you a disk image where the work is already done. The trade is that you inherit the project's choices: its base OS, its default user, its camera pipeline, its release cadence.

If your goal is OctoPrint on a desktop Linux machine or a small x86 box, this repository is not the tool. It builds ARM images for two named board families. The distinction matters because a large share of search traffic around the name comes from people looking for a package manager front end on Arch, which is a different project that shares the word.

How the build works: CustomPiOS, chroot, and a downloaded base image

OctoPi does not assemble a root filesystem from packages. It takes a Raspberry Pi OS image you download, mounts it, and applies modifications inside a chroot using qemu-arm-static so that ARM binaries can execute on the build host. That is why the requirements list qemu-arm-static, root privileges for chroot, and CustomPiOS, which supplies the build framework and the variant mechanism. The layout reflects this: the repository is thin, with src/ holding the build entry points and the actual image recipe living largely in CustomPiOS.

The build host can be Debian, Ubuntu, Raspberry Pi OS, or OctoPi itself. The README states the build needs about 2.5 GB of free space. Variants are builds with changes from the main release build, and the README points at an example under CustomPiOS in src/variants/example. So the architecture is layered: CustomPiOS owns the generic image-building machinery, OctoPi owns the printer-specific configuration, and a variant owns a delta on top. If you want a customized image for a fleet, that layering is the useful part. If you just want a working printer host, you can ignore all of it and download a release.

One consequence worth noting: because the recipe depends on a downloaded base image and on CustomPiOS at a given point in time, a build is not reproducible from the OctoPi repository alone. The README instructs you to clone CustomPiOS separately and to run ../../CustomPiOS/src/update-custompios-paths before building.

Flashing OctoPi and reaching octopi.local for the first time

The README's own instructions start from a downloaded image, not from source. Download the latest stable build from the project's release page or one of the mirrors it lists, unzip the image, and write it to an SD card like any other Raspberry Pi image. Before you eject the card, mount it as a thumb drive and edit wifi.nmconnection on the root of the first bootfs partition to set your wireless credentials. If you skip that step the Pi boots without a network and you will need a monitor and keyboard.

After boot, the Pi is reachable at octopi.local if your computer supports Bonjour, or at the IP address your router assigned. The default username is pi and the default password is raspberry. Log in over SSH and run raspi-config:

ssh [email protected]
sudo raspi-config

Inside raspi-config the README walks through changing the password under Change User Password, optionally setting the timezone under Localization Options, and optionally changing the hostname under Network Options. If you change the hostname, the instance is no longer reachable at octopi.local but at your chosen hostname postfixed with .local. You do not need to expand the filesystem, because current versions of OctoPi do that automatically.

OctoPrint itself is served at http://octopi.local and at https://octopi.local. The SSL certificate is self signed and generated on first boot, so the HTTPS address produces a certificate warning. The README says to ignore it. If a USB webcam or the Raspberry Pi camera is detected, mjpg-streamer starts automatically as the webcam server, and OctoPrint ships with stream and snapshot URLs already pointing at it. The stream is also directly reachable:

# webcam stream through OctoPrint's proxy
http://octopi.local/webcam/?action=stream

# mjpg-streamer directly on its configured port
http://octopi.local:8080/?action=stream

For plugin installation from a shell rather than through OctoPrint's plugin manager, pip lives inside OctoPrint's virtual environment, so an install looks like this:

/home/pi/oprint/bin/pip install <plugin-uri>

Where OctoPi stops being the right answer

The defaults are a security posture, and it is a weak one. The image ships with the username pi and the password raspberry, both documented publicly. Until you change the password in raspi-config, anyone who can reach the host on your network can log in. The README treats this as a first-boot chore, and it is one you must actually perform rather than skip past.

The HTTPS story is similar. The certificate is self signed and generated on first boot, so browsers will warn and any client that validates certificates will refuse. That is acceptable for a printer on a home LAN and unacceptable if you intend to expose the instance beyond it. The README offers no reverse proxy or certificate guidance, and no rollback procedure if a flash or an upgrade goes wrong; that silence is worth taking at face value.

Board support is narrower than the name suggests. The README names Raspberry Pi OS images and the Le Potato AML-S905X-CC, with the latter marked currently in beta. There is no documented path for x86, for other single-board computers, or for running OctoPi on hardware you already own as a general-purpose server. If your printer host is a mini PC, this project is the wrong shape entirely.

Finally, the release cadence is uneven. The three most recent releases are 1.1.0 on 2025-05-05, 1.0.0 on 2023-02-21, and 0.18.0 on 2021-01-25. The repository's last push was 2026-08-03, so work continues between releases, but anyone expecting a steady stream of tagged images should plan around the gaps rather than assume them away.

OctoPi against installing OctoPrint yourself

The obvious alternative is not another distribution. It is installing OctoPrint directly on Raspberry Pi OS, or on whatever Linux machine you already run, following OctoPrint's own installation instructions. The difference is who owns the integration. With OctoPi, someone else has already decided the base OS, the Python environment, the service layout, the camera pipeline, and the stream URLs that OctoPrint points at. With a manual install, you make each of those decisions and you debug each of them.

That cuts both ways. A manual install gives you a current base OS and a current OctoPrint whenever you choose to upgrade, and it works on hardware OctoPi does not target. It also means the camera stream is your problem: you install mjpg-streamer or an alternative, you configure the URLs in OctoPrint, and you keep them working across upgrades. OctoPi's value is precisely that this is done for you and tested as a combination.

There is a third path worth naming: OctoPi variants, built through CustomPiOS. If you need an image with your own modifications, the variant mechanism is the intended route, and the README points to an example under CustomPiOS in src/variants/example. That is a build-time answer, not a runtime one, so it only helps if you are comfortable producing images rather than consuming them.

Licence, maintenance, and what an upgrade costs you

OctoPi is licensed GPL-3.0. That is a source licence for the build scripts in this repository, and it is separate from the licences of what ends up inside the image: OctoPrint, mjpg-streamer, Raspberry Pi OS, and whatever plugins you install each carry their own terms. If you redistribute a modified image, the obligations you take on are not limited to this repository, and the README does not attempt to summarize them. Treat the licence question as one to raise with whoever handles compliance where you work; nothing here is legal advice.

On maintenance, the repository is not archived, and the last push was on 2026-08-03. Releases are the more useful signal for an image-based project, and they are sparse: 1.1.0 in May 2025, 1.0.0 in February 2023. Practically, that means the image you flash is a snapshot of OctoPrint and its dependencies from whenever that release was cut, and keeping OctoPrint current is something you do inside the running instance rather than by reflashing.

The upgrade path has a real cost. There is no documented in-place upgrade from one OctoPi release to the next in the README. The workflow it describes is download, flash, boot, configure, which means a card swap and a re-run of the first-boot steps for anything you cannot carry over. Back up your OctoPrint configuration and plugin list before you reflash, because the README does not describe a migration tool. Nightly builds exist at the mirrors the README lists, including 64-bit nightlies, and they can be added to Raspberry Pi Imager as a repository:

rpi-imager --repo https://unofficialpi.org/rpi-imager/rpi-imager-octopi.json

Nightlies are the way to get current software on a fresh card. They are also the way to get an image nobody has promised is stable, so pick deliberately between the two.

Editorial conclusion

Adopt OctoPi if you want a Raspberry Pi (or a Le Potato AML-S905X-CC, currently in beta) to serve OctoPrint over the network and you are happy to flash a card rather than install packages. Do not adopt it if you want OctoPrint on x86 hardware, on a general-purpose desktop distribution, or if you need a vendor-supported appliance with a formal support contract; the project ships images, not support. Before flashing, verify that your target board is one of the two the README names, that you have the free space the build instructions require (about 2.5 GB) if you intend to build rather than download, and that the release you pick is the one you want, since the latest stable is 1.1.0 from 2025-05-05 and the previous release, 1.0.0, dates from 2023-02-21.

Frequently asked questions

Official sources

1. guysoft/OctoPi on GitHub
2. Issues
3. License: GPL-3.0
4. README
5. Releases